         coll15 (d/ingest "CMR_PROV2" (dc/collection {:entry-title "coll15" :processing-level-id "plid1"
                                                      :collection-data-type "cldt" :platforms [p1]
                                                      :summary "summary" :temporal-keywords ["tk1" "tk2"]}))
-        coll16 (d/ingest "CMR_PROV2" (dc/collection {:entry-id "entryid4"}) :dif)]
+        coll16 (d/ingest "CMR_PROV2" (dc/collection {:entry-id "entryid4"}) :dif)
+        coll17 (d/ingest "CMR_PROV2" (dc/collection {:associated-difs ["DIF-1" "DIF-2"]}))]
 
     (index/refresh-elastic-index)
 

           "Level2-2" [coll9]
           "Level2-3" [coll9]
           ;; - detailed-variable
           "SUPER" [coll9]



           ))

    (testing "search by keywords using wildcard *."
      (are [keyword-str items]

           ;; temporal keywords
           "tk1" [coll15]

           ;; spatial keywords
           "in" [coll10]

           ;; associated difs
           "dif-1" [coll17]

           ;; two d coord
           "xyz" [coll2 coll13]

           ;; archive center
           "some" [coll6]

           ;; TODO
           ;; attributes
           "charlie" [coll12]

           ;; Platforms
           ;; - short name
